Issues with NCS python stream example

Having fun playing with the NCS. I got the SDK and API installed without error, ran the make check, etc. and everything seemed to go according to plan (I was following the "getting started" video on the Movidius site). However, the python stream example doesn't appear to be working for me. When I run the example, I just get a static set of categories (toilet paper, etc.) with a NaN probability (see the attached image).